Across
1
Hottest planet in solar system
4
Preserved remains of ancient life
6
Measure of matter in an object
7
Fourth state of matter
8
Natural satellite of Earth
Down
2
Second lightest element
3
The Red Planet
5
Particle of light
Hottest planet in solar system
Preserved remains of ancient life
Measure of matter in an object
Fourth state of matter
Natural satellite of Earth
Second lightest element
The Red Planet
Particle of light